Inspired by the lyrics to the Crash Test Dummies song "Swimming in Your Ocean." (Don't worry if you haven't listened; most people haven't.) In this song, the singer describes some of the oddball thoughts that distract him during sex. It got me wondering what kind of crazy thoughts could distract the participants in a crossover pairing. So show me those thoughts.

Requirements:
A character from Buffy or Angel paired in a sexual relationship with someone from another fandom. (Het or slash are both fine).
One or both of the partners getting distracted by strange thoughts when they...